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authorAlexander Harkness <bearbin@gmail.com>2013-11-24 15:19:41 +0100
committerAlexander Harkness <bearbin@gmail.com>2013-11-24 15:19:41 +0100
commit675b4aa878f16291ce33fced48a2bc7425f635ae (patch)
tree409914df27a98f65adf866da669429c4de141b6f /src/Blocks/BlockVine.h
parentLineBlockTracer: Using the coord-based block faces. (diff)
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Diffstat (limited to 'src/Blocks/BlockVine.h')
-rw-r--r--src/Blocks/BlockVine.h201
1 files changed, 201 insertions, 0 deletions
diff --git a/src/Blocks/BlockVine.h b/src/Blocks/BlockVine.h
new file mode 100644
index 000000000..2c9f67cab
--- /dev/null
+++ b/src/Blocks/BlockVine.h
@@ -0,0 +1,201 @@
+
+#pragma once
+
+#include "BlockHandler.h"
+
+
+
+
+
+class cBlockVineHandler :
+ public cBlockHandler
+{
+public:
+ cBlockVineHandler(BLOCKTYPE a_BlockType)
+ : cBlockHandler(a_BlockType)
+ {
+ }
+
+
+ virtual bool GetPlacementBlockTypeMeta(
+ cWorld * a_World, cPlayer * a_Player,
+ int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace,
+ int a_CursorX, int a_CursorY, int a_CursorZ,
+ BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta
+ ) override
+ {
+ // TODO: Disallow placement where the vine doesn't attach to something properly
+ BLOCKTYPE BlockType = 0;
+ NIBBLETYPE BlockMeta;
+ a_World->GetBlockTypeMeta(a_BlockX, a_BlockY, a_BlockZ, BlockType, BlockMeta);
+ if (BlockType == m_BlockType)
+ {
+ a_BlockMeta = BlockMeta | DirectionToMetaData(a_BlockFace);
+ }
+ else
+ {
+ a_BlockMeta = DirectionToMetaData(a_BlockFace);
+ }
+ a_BlockType = m_BlockType;
+ return true;
+ }
+
+
+ static NIBBLETYPE DirectionToMetaData(char a_BlockFace)
+ {
+ switch (a_BlockFace)
+ {
+ case BLOCK_FACE_NORTH: return 0x1;
+ case BLOCK_FACE_SOUTH: return 0x4;
+ case BLOCK_FACE_WEST: return 0x8;
+ case BLOCK_FACE_EAST: return 0x2;
+ default: return 0x0;
+ }
+ }
+
+
+ static char MetaDataToDirection(NIBBLETYPE a_MetaData)
+ {
+ switch(a_MetaData)
+ {
+ case 0x1: return BLOCK_FACE_NORTH;
+ case 0x4: return BLOCK_FACE_SOUTH;
+ case 0x8: return BLOCK_FACE_WEST;
+ case 0x2: return BLOCK_FACE_EAST;
+ default: return BLOCK_FACE_TOP;
+ }
+ }
+
+
+ /// Returns true if the specified block type is good for vines to attach to
+ static bool IsBlockAttachable(BLOCKTYPE a_BlockType)
+ {
+ return (a_BlockType == E_BLOCK_LEAVES) || g_BlockIsSolid[a_BlockType];
+ }
+
+
+ /// Returns the meta that has the maximum allowable sides of the vine, given the surroundings
+ NIBBLETYPE GetMaxMeta(cChunk & a_Chunk, int a_RelX, int a_RelY, int a_RelZ)
+ {
+ static const struct
+ {
+ int x, z;
+ int Bit;
+ } Coords[] =
+ {
+ { 0, 1, 1}, // south, ZP
+ {-1, 0, 2}, // west, XM
+ { 0, -1, 4}, // north, ZM
+ { 1, 0, 8}, // east, XP
+ } ;
+ int res = 0;
+ for (int i = 0; i < ARRAYCOUNT(Coords); i++)
+ {
+ BLOCKTYPE BlockType;
+ NIBBLETYPE BlockMeta;
+ if (
+ a_Chunk.UnboundedRelGetBlock(a_RelX + Coords[i].x, a_RelY, a_RelZ + Coords[i].z, BlockType, BlockMeta) &&
+ IsBlockAttachable(BlockType)
+ )
+ {
+ res |= Coords[i].Bit;
+ }
+ }
+ return res;
+ }
+
+
+ void Check(int a_RelX, int a_RelY, int a_RelZ, cChunk & a_Chunk) override
+ {
+ NIBBLETYPE CurMeta = a_Chunk.GetMeta(a_RelX, a_RelY, a_RelZ);
+ NIBBLETYPE MaxMeta = GetMaxMeta(a_Chunk, a_RelX, a_RelY, a_RelZ);
+
+ // Check if vine above us, add its meta to MaxMeta
+ if ((a_RelY < cChunkDef::Height - 1) && (a_Chunk.GetBlock(a_RelX, a_RelY + 1, a_RelZ) == m_BlockType))
+ {
+ MaxMeta |= a_Chunk.GetMeta(a_RelX, a_RelY + 1, a_RelZ);
+ }
+
+ NIBBLETYPE Common = CurMeta & MaxMeta; // Neighbors that we have and are legal
+ if (Common != CurMeta)
+ {
+ // There is a neighbor missing, need to update the meta or even destroy the block
+ bool HasTop = (a_RelY < cChunkDef::Height - 1) && IsBlockAttachable(a_Chunk.GetBlock(a_RelX, a_RelY + 1, a_RelZ));
+ if ((Common == 0) && !HasTop)
+ {
+ // The vine just lost all its support, destroy the block:
+ if (DoesDropOnUnsuitable())
+ {
+ int BlockX = a_RelX + a_Chunk.GetPosX() * cChunkDef::Width;
+ int BlockZ = a_RelZ + a_Chunk.GetPosZ() * cChunkDef::Width;
+ DropBlock(a_Chunk.GetWorld(), NULL, BlockX, a_RelY, BlockZ);
+ }
+ a_Chunk.SetBlock(a_RelX, a_RelY, a_RelZ, E_BLOCK_AIR, 0);
+ return;
+ }
+ a_Chunk.SetBlock(a_RelX, a_RelY, a_RelZ, m_BlockType, Common);
+ }
+ else
+ {
+ // Wake up the simulators for this block:
+ int BlockX = a_RelX + a_Chunk.GetPosX() * cChunkDef::Width;
+ int BlockZ = a_RelZ + a_Chunk.GetPosZ() * cChunkDef::Width;
+ a_Chunk.GetWorld()->GetSimulatorManager()->WakeUp(BlockX, a_RelY, BlockZ, &a_Chunk);
+ }
+ }
+
+
+ virtual bool DoesIgnoreBuildCollision(void) override
+ {
+ return true;
+ }
+
+
+ virtual const char * GetStepSound(void) override
+ {
+ return "step.grass";
+ }
+
+
+ virtual bool DoesDropOnUnsuitable(void) override
+ {
+ return false;
+ }
+
+ virtual void OnUpdate(cWorld * a_World, int X, int Y, int Z)
+ {
+ if (a_World->GetBlock(X, Y - 1, Z) == E_BLOCK_AIR)
+ {
+ a_World->SetBlock(X, Y - 1, Z, E_BLOCK_VINES, a_World->GetBlockMeta(X, Y, Z));
+ }
+ }
+
+ virtual NIBBLETYPE MetaRotateCCW(NIBBLETYPE a_Meta) override
+ {
+ return ((a_Meta >> 1) | (a_Meta << 3)) & 0x0f; // Rotate bits to the right
+ }
+
+
+ virtual NIBBLETYPE MetaRotateCW(NIBBLETYPE a_Meta) override
+ {
+ return ((a_Meta << 1) | (a_Meta >> 3)) & 0x0f; // Rotate bits to the left
+ }
+
+
+ virtual NIBBLETYPE MetaMirrorXY(NIBBLETYPE a_Meta) override
+ {
+ // Bits 2 and 4 stay, bits 1 and 3 swap
+ return ((a_Meta & 0x0a) | ((a_Meta & 0x01) << 2) | ((a_Meta & 0x04) >> 2));
+ }
+
+
+ virtual NIBBLETYPE MetaMirrorYZ(NIBBLETYPE a_Meta) override
+ {
+ // Bits 1 and 3 stay, bits 2 and 4 swap
+ return ((a_Meta & 0x05) | ((a_Meta & 0x02) << 2) | ((a_Meta & 0x08) >> 2));
+ }
+} ;
+
+
+
+